#include <bits/stdc++.h>
using namespace std;
const int N = 1000*1000+5;
int a[N];
bool col[N];
vector<int> mark[N];
int main(){
ios_base::sync_with_stdio(false);
int n;
// cout<<0<<endl;
cin>>n;
for(int i = 1;i<=n;i++) cin>>a[i];
int ans = 0;
for(int i = 1;i<=n;i++){
int x = a[i];
if(mark[x+1].size() == 0){
mark[x].push_back(i);
ans++;
continue;
}
mark[x+1].pop_back();
mark[x].push_back(i);
}
cout<<ans<<endl;
return 0;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
24 ms |
23800 KB |
Output is correct |
2 |
Correct |
24 ms |
23800 KB |
Output is correct |
3 |
Correct |
25 ms |
23928 KB |
Output is correct |
4 |
Correct |
25 ms |
23928 KB |
Output is correct |
5 |
Correct |
126 ms |
28252 KB |
Output is correct |
6 |
Correct |
118 ms |
28536 KB |
Output is correct |
7 |
Correct |
101 ms |
28152 KB |
Output is correct |
8 |
Correct |
99 ms |
28152 KB |
Output is correct |
9 |
Correct |
125 ms |
28152 KB |
Output is correct |
10 |
Correct |
109 ms |
28472 KB |
Output is correct |